[Osteoid Osteoma and Lumbar Non-structural Scoliosis.]

A benign bone lesion osteoid is characterized by sclerotic bone interface with a central nidus and pain at night which can be influenced by salicylates. When located on vertebrae or ribs it may cause non-structural scoliosis. Authors describe a case of 11-year old girl suffering from pain in lumbar spine at night, with left-side non-structural scoliosis which was unsuccessfully treated by physical therapy. Subsequently she was handled by radical resection of the L5 pedicle on the right side where osteoid osteoma was revealed by means of CT and later verified by histology. Unfortunately, minor non-structural scoliosis of lumbar spine persist also after the surgery. Key words: osteoid osteoma of spine, non-structural scoliosis, surgical treatment.